Hi there, @gcarhic-h-c-h-co.

I'm here to shed some light on IIF importing in QuickBooks.

We're unable to import IIF into QuickBooks Online; this feature is only available in QuickBooks Desktop.

You can consider Fiat Lux - ASIA's suggestion above or visit the QuickBooks App Center for a third-party application that your company requires. Enter the app name or keyword in the search bar.

I'm always available to assist you if you have any additional concerns about running your business. Stay safe!